Automatic tank-pump for automobiles.



Patented July 2, l90l.

6. B. STACY. AUTOMATIC TANK PUMP FOB AUTOMOBILES.

.(A'pplication filed Nov. 13, 1900.)

(No Model.)

A TTORNE rs ml mm PUER! 60.. Wauma. WASHINGTON. a. c.

UNITED STATES PATENT EETQE.

GEORGE B. STACY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO ALEXANDER H.SPENCER, OF NEW YORK, N. Y.

AUTOMATIC TANK-PUMP FOR AUTOMOBILES.

SPECIFICATION forming part of Letters Patent N 0. 677,709, dated July 2,1901.

Application filed November 13, 1900, Serial No. 36,356. (No model.)

To all whom it may concern:

Be it known that I, GEORGE BLAIR STACY, a citizen of the United States,and a resident of Boston, in the county of Sufiolk and State ofMassachusetts, have invented a new and Improved Automatic Tank-Pump forAuto- 1nobiles, of which the following is a full, clear, andexactdescription.

The invention relates to automobiles having an explosive mixture of airand gas as the motive agent.

The object of the invention is to provide a new and improved pumpcompletely under the control of the operator in charge of an automobileand actuated while the automobile is in motion by one of the wheelsthereof, the pump being designed to fill the air-tank with air under thedesired pressure to insure proper working of the motor employed forpropelling the vehicle.

The invention consists of novel features and parts and combination ofthe same, as will befully described hereinafter and then pointed out inthe claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a side elevation of the improve- 'ment as applied. Fig. 2 isa sectional plan view of the same. Fig. 3 is a crosssection of the sameon the line 3 3 in Fig. 1. Fig. 4 is a like view of the same on the line44 in Fig. 1, and Fig. 5 is an enlarged sectional side elevation of theguideway for the pump-rod.

On one of the wheels A of the vehicle is secured a cam 13, on which isadapted to travel 'an antifriction roller 0-, journaled in the outer endof a plunger-rod D, carrying a plunger E, contained within the cylinderF of the air-pump. The cylinder F is mounted to slide in the directionof its length in bearings 'G G, attached to a fixed sleeve H, throughwhich extends the axle I of the wheel A. On the outside of the cylinderF is secured a rack J, in mesh with a gear-wheel K, having its shaft Kjournaled in the bearing G, and on said shaft is secured a crank-arm L,connected by links or other devices with a handlever or the like underthe control of the op erator in charge of the automobile. A spring N isactuated from the plunger-rod D and presses with one end on the cylinderF and with its other end on the head of the plungerrod, so as tonormally hold the plunger E in an outermost position in the cylinder F,as is plainly shown in Fig. 2.

When the operator actuates the hand-lever mentioned, then the gear-wheelK is turned and the rack J and the cylinder F are shifted to change theposition of the cylinder F, the plunger-rod E, plunger-rod D, and theroller O relatively to the cam-wheel'B to increase or diminish thestroke of the plunger in the cylinder, when the wheel A rotates and thecam Bimparts an inward-sliding motion to the plunger and the spring Nimparts a re- During the rethe inner end of the cylinder past theplunger E, and during the inward stroke of the plunger, caused by theaction of the cam B on the roller 0, the air is forced out of thecylinder into apipe 0, connected with the air reservoir or tank of themotor.

In order to properly guide the plunger-rod D, a guideway P is secured tothe sleeve H and is formed with an elongated slot P, en-

gaged by an antifriction-roller P held on the plunger-rod D, to guidethe latter'during its travel and to prevent it from turning, and therebymaintain the antifriction-roller O in proper position relatively to theface of the cam 13. The antifriction-roller is mounted on a screw-boltwhose enlarged head works in contact with the inner side of the guidewayP, so that the head of the piston-rod is prevented from movement in anylateral direction, however rough or uneven the road- 0 way may be.

It is understood that when the vehicle is in use the wheel A actuatesthe pump during each revolution of the wheel, so that the desired amountof air in the air-.

tank is maintained to insure the proper formation of the explosivemixture used as the motive agent for propelling the vehicle. By theoperator shifting the cylinder the stroke of the pump is increased ordiminished, and

consequently more or less air is pumped to too the tank to maintain auniform air-pressure in the tank.

The device is very simple and durable in construction, can be readilyapplied to a vehicle, is not liable to get out of order, and iscompletely under the control of the operator for the purpose mentioned.

Having thus fully described my inyention, I claim as new and desire tosecure by Letters Patent 1. In an automatic pump for the air-tank of anautomobile, the combination, with a running wheel and a cam fixedthereon, of a pump-cylinder fixed as to rotation, a piston workingtherein and having a rod adapted to engage the cam, a slotted guidewayfixed parallel to the piston-rod, a projection on said rod which worksin said slot and is provided with a head working on the inner side ofthe guideway, substantially as shown and described.

2. In an automatic pump for the air-tank of an automobile, thecombination, with the Wheel, cam, cylinder, and piston having a rodengaging the cam and working loose in the cylinder-head, of a guide forthe rod in its reeiprocations, said guide being fixed between thecam-wheel and cylinder so that it is engaged by the head of the rod,as-shown and described.- I

3. An automatic pump for the air-tank of automobiles, comprising alongitudinallymovable pump-cylinder, a plunger movable therein, a cam onone of the wheels of the automobile and engaging the outer end of theplunger-rod, and means under the control of the operator, for shiftingsaid cylinder toward or from said cam, to increase or diminish thestroke of the plunger in the said cylinder, as set forth.

4. An automatic pump for the air-tank of automobiles, having a cylindermovable relatively to its plunger, to increase or diminish the stroke ofthe plunger in the cylinder, the said means comprising a rack on thecylinder, and a gear-wheel in mesh with the rack, and adapted to beturned by the operator in charge of the automobile, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

enoaen 1:. STACY. 'Witnesses:

THEO. G. HosTER, EVERARD BOLTON MARSHALL.

